In Vedic literature we understand that Nārāyaṇa, the Supreme Person, is residing both outside and inside of every living entity. He is present in both the spiritual and material worlds. Although He is far, far away, still He is near to us. These are the statements of Vedic literature. Āsīno dūraṁ vrajati śayāno yāti sarvataḥ (Kaṭha Upaniṣad 1.2.21). And because He is always engaged in transcendental bliss, we cannot understand how He is enjoying His full opulence. We cannot see or understand with these material senses. Therefore in the Vedic language it is said that to understand Him our material mind and senses cannot act. But one who has purified his mind and senses by practicing Kṛṣṇa consciousness in devotional service can see Him constantly. It is confirmed in Brahma-saṁhitā that the devotee who has developed love for the Supreme God can see Him always, without cessation. And it is confirmed in Bhagavad-gītā (11.54) that He can be seen and understood only by devotional service. Bhaktyā tv ananyayā śakyaḥ.
(Bhagavad-Gita---13:16---purport).

The purpose of food is to increase the duration of life, purify the mind and aid bodily strength. This is its only purpose. In the past, great authorities selected those foods that best aid health and increase life's duration, such as milk products, sugar, rice, wheat, fruits and vegetables. These foods are very dear to those in the mode of goodness. Some other foods, such as baked corn and molasses, while not very palatable in themselves, can be made pleasant when mixed with milk or other foods. They are then in the mode of goodness. All these foods are pure by nature.
(Bhagavad-Gita---17:10---purport).

The process of being liberated from the misconception of material identification is called, in different stages, fruitive activity, empiric philosophy and devotional service, up to transcendental realization. Such transcendental realization is made possible by dovetailing all the above items in relation with the Lord. Prescribed duties of the human being, as directed in the Vedas, can gradually purify the sinful mind of the conditioned soul and raise him to the stage of knowledge. The purified stage of acquiring knowledge becomes the basis of devotional service to the Lord. As long as one is engaged in researching the solution of the problems of life, his knowledge is called jñāna, or purified knowledge, but on realizing the actual solution of life, one becomes situated in the devotional service of the Lord.
(Srimad Bhagavatam--1:15:27---purport).

The material color of the mind is changed when one washes it from contaminations of life-breathing and thereby frees it from the contamination of repeated births and deaths and situates it in pure spiritual life. All is manifested by the temporary embodiment of the material body, which is a production of the mind at the time of death, and if the mindis purified by practice of transcendental loving service to the Lord and is constantly engaged in the service of the lotus feet of the Lord, there is no more chance of the mind's producing another material body after death. It will be freed from absorption in material contamination. The pure soul will be able to return home, back to Godhead.
(Srimad Bhagavatam---1:15:41---purport).

Kāma and lobha are the symptoms of material existence. Everyone always desires to possess something. It is said here that desire and greed are the products of false identification of oneself with the body. When one becomes free from this contamination, then his mind and consciousness also become freed and attain their original state. Mind, consciousness and the living entity exist. Whenever we speak of the living entity, this includes the mind and consciousness. The difference between conditional life and liberated life occurs when we purify the mind and the consciousness. When they are purified, one becomes transcendental to material happiness and distress.
(Srimad Bhagavatam--3:25:16---purport).

Forgetfulness of one's relationship with the Supreme Personality of Godhead is a product of ignorance. By yoga practice one can eradicate this ignorance of thinking oneself independent of the Supreme Lord. One's actual relationship is eternally that of love. The living entity is meant to render transcendental loving service to the Lord. Forgetfulness of that sweet relationship is called ignorance, and in ignorance one is impelled by the three material modes of nature to think himself the enjoyer. When the devotee's mind is purified and he understands that his mind has to be dovetailed with the desires of the Supreme Personality of Godhead, he has attained the perfectional, transcendental stage, which is beyond the perception of material distress and happiness.
(Srimad Bhagavatam---3:28:36---purport).

The origin of creation is sound vibration, and if the sound vibration is clear and purified, perfect knowledge and perfect activities actually become manifest. This is enacted by the chanting of the mahā-mantra, Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare. Thus Lord Śiva is praying again and again for the purification of body, mind and activities through the purification of knowledge and action under the pure directions of the Vedas. Lord Śiva prays to the Supreme Personality of Godhead so that his mind, senses and words will all turn toward devotional activities only.
(Srimad Bhagavatam---4:24:43---purport).